I usually pick mine up by the holes in the back of the soundboard with my hand on the column to steady it and I have never carried it around any other way (except in a case).
However, at Highland Games last year, they had a special guest play during the evening harp concert.
So it’s safe for me to do that with my Troub VI? At nearly forty pounds, it would be more comfortable to carry it that way, since I don’t use a dolly cart.